Burning bricks



UNITED sTATEs PATENT oEEIcE. f

YJ OEL VW. ANDREWS, OF NORRISTOWN, PENNSYLVANIA.

BURNING BEIcKs.

Specification of Letters Patent No. 3,016, dated March 21, 1843.

To all whom may concern.'

Be it known that I, J OEL W. ANDREWS, lof Norristown, in the county of Montgomery and State of Pennsylvania. have invented certain new and useful improvements in the manner of burning bricks, which I effect by mea-nsof anthracite as fuel in a kiln constructed especially for that purpose; and I do hereby declare that the following 1s a full and exact description thereof. Y

I construct akiln the walls of which are similar to those no-w. in use; and under the floor of this kiln I form air i'lues leading into vair-chambers, orV ash-pits, under the grate bars, upon which the fuel 1s to be placed. The air necessary to combustion, I force into these iues by means of a fan wheel, or other blowing apparatus; the man- Yner in which the respective parts are arranged and governed is represented in the accompanying drawing, in which A, A, Figure l, are the walls of the kiln, as seen on a horizontal plane, on a level, or nearly so, with the floor of the kiln.

B, B, are the grate bars upon which the fuel is to be placed, and below each of these, there is an air-chamber, or ash-pit, furnished with close tting, iron doors, c Fig. 2, as are also the re holes, d, above them, through which the fuel is supplied.

C, is an air-chamber, into which wind may be blown by means of a wind-wheel, or otherwise; and from this chamber extend two longitudinal flues, D, D, which are cai'- ried along the kiln, to the farthermost ashpit; and are separat-ed from each other by a partition wall; these vHues may be about eight inches square, and the bottoms of them may he about two feet below the floor of the kiln; in the drawings, they'are shown as removed. From these two flues, there proceed lateral flues, E, E, which may be six inches square, and serve to supply air to the respective tires. Each of these lateral flues is furnished with a damper, as at a, a. The two flues, E', E', may be opened, or closed, by the rods, Z), b, at he back of the kiln. The other lateral fines, I construct in such manner as that the rods o, c, which operate as is ordinarily used in grates, and find it the heat in the immediate vicinity of the fire rendering this precaution necessary. In my first experiments, I placed the grate bars near to each other in order to use the smaller kind of coal; but I now employ coal as large good economy so to do, as the lire is easily managed, and the heat `readily vdiused ,throughout the kiln, producing an economy in the cost of fuelequal to fifty per .ent., when compared with wood, and a saving ofA full one half of the time required for burning with the latter fuel.

The re holes, I build four feet apart, and

make them ten inches wide by sixteen high, as are, also, the holes for the ash-pit doors. The grate bars, I place about three inches below the bottom of the doors of the lireholes, as shown by the dotted lines e, c, Fig. 2, and the same distance lower than the floor of the kiln. The grate bars extend five feet into the kiln, the latter being about sixteen feet wide, thus allowing a distance of f about six feet between their inner ends. The ash-pit which extends under the grate bars, I have made one foot wide, and two feet deep. y Y

In setting the bricks in the kiln, the arches are made to extend entirely through, from side to side, and the bricks are placed somewhat farther apart than when wood is used as fuel. The number of fire holes may, of course, be varied, as may, also, the dimensions of the other parts, without thereby changing the principle of act-ion.

Having thus fully set forth the manner in which VI construct, and use, my kiln for burning bricks by means of anthracite coal, what I claim therein as new, and desire to secure by Letters Patent, is

The particular arrangement and combination of the ues, dampers, and lire compartments therein; there being a double flue along the center, from which lateral ues branch oil' ina curved, or angular, manner, so as to admit of the employment of dampers in each, in the manner herein represented,v and made known.

JOEL w. ANnEEws. 

